1 Thus the heavens and the earth were finished, and all the host of them.

2 And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made.

3 And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made.

A great work never seems complete until we have settled back and looked long and hard at what was accomplished. A garden of crops, a finished basement, a manuscript, a college diploma…all of these need a moment for us to appreciate what has been done.
The thought occurs to me that sitting back and appreciating the creations of God is an excellent way to observe the sabbath, too. After all, the whole point of this seventh day was to cap off that work of creation, so what better way to commemorate it than by immersing oneself in it?
I also want to point out that while this seventh day was the end of God’s creation, it was only the beginning of mankind’s creations. Everything that we fashion on earth is built on the foundation of what He created first. Therefore I think it wise to view the sabbath in that light, too. We should have it be the foundation of our week, the cornerstone that everything else is built upon, not a garnish off to the side of everything else.